桥梁结构模态参数识别,emd,hht,wt-parameter identification using emd method

itd，一种时域模态参数识别方法，可以得到结构频率，阻尼比，振型，可直接使用，不需更改-A time domain modal parameter identification, can be measured data get the structure frequency and damping ratio and mode shapes

随机子空间法，用于结构模态参数识别，能够得到结构频率，阻尼比，精度高-A time domain modal parameter identification, can be measured data get the structure frequency and damping ratio and mode shapes